Page 2
IMPORTANT NOTICE This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated.
Page 9
PSR-E343/PSR-E344/YPT-340 ■ CIRCUIT BOARD LAYOUT & WIRING(ユニットレイアウト & 結線図) (バックライト Ass y) (上ケース Ass y) (スピーカ 右) (スピーカ 左) (下ケース鍵盤 Ass y) Unit Name Location Parts No. Connector Assembly Destination Remarks (ユニット名) (ロケーション) (部品番号) (束線名) (配線先) (備考) * The parts with “( )” in “Part No.” are not available as spare parts.
Page 11
PSR-E343/PSR-E344/YPT-340 ■ DISASSEMBLY PROCEDURE(分解手順) Caution: Be sure to attach the removed fi lament tape just as it was before removal. 注意 : 分解時に取り外したフィラメントテープは、必ず元通りに取り付けてください。 Lower Case Assembly 1. 下ケース Ass'y(所要時間 : 約 2 分) (Time required: About 2 minutes) 1-1 [80A] のネジ 1 本、[80B] のネジ 4 本と [100] のネジ ...
Page 12
PSR-E343/PSR-E344/YPT-340 DMLCD Circuit Board 2. DMLCD シート(所要時間 : 約 3 分) (Time required: About 3 minutes) 2-1 下ケース Ass'y を外します。 (1 項参照) Remove the lower case assembly. (See procedure 1) 2-2 [380A] のネジ 12 本を外して、DMLCD シートを外 Remove the twelve (12) screws marked [380A]. The ...
Page 13
PSR-E343/PSR-E344/YPT-340 PN Circuit Board, AM Circuit Board, MVR 4. PN シート、AM シート、MVR シート Circuit Board 4-1 下ケース Ass'y を外します。 (1 項参照) Remove the lower case assembly. (See procedure 1) 4-2 MVR シート(所要時間:約 3 分) MVR Circuit Board (Time required: About 3 minutes) 4-2-1 ...
Page 14
PSR-E343/PSR-E344/YPT-340 SP Grille (Time required: About 3 minutes each) 6. SP グリル(所要時間 : 各約 3 分) Remove the lower case assembly. (See procedure 1) 6-1 下ケース Ass 'y を外します。 (1 項参照) Release the four (4) claws marked [A] of the SP grille and 6-2 ...
Page 15
PSR-E343/PSR-E344/YPT-340 8-3-3 To remove the white key C6, remove the screw marked 8-3-3 C6 の白鍵は [120B] のネジ 1 本を外して、8-3-2 項の [120B], unhook as described in Procedure 8-3-2, and pull ようにフックを外して手前に引きながら外します。 out toward you. (Fig.6) (図 6) When all white and black keys were removed, first ※ ...
Page 16
PSR-E343/PSR-E344/YPT-340 (上か ら見た図) (接点ゴム) (接点ゴム) (接点ゴム) (接点ゴム) (接点ゴム) Fig.7 (図 7) 61L-MK 61H-MK Fig.8 (図 8) Circuit Board 61L-MK シート 61L 8-5 8-5-1 Remove the white and black keys from C1 to B3. 8-5-1 C1 〜 B3 の白鍵・黒鍵を外します。 (See Fig.6 and Procedure 8-3.) ...
Page 17
PSR-E343/PSR-E344/YPT-340 How to Remove Spring Terminals 9. 接点バネの外し方 Spring Terminal A and Spring Terminal B 接点バネ A、 接点バネ B (所要時間 : 各約 4 分) 9-1 (Time required: About 4 minutes each) 9-1-1 下ケース Ass y を外します。 (1 項参照) 9-1-1 Remove the lower case assembly. (See procedure 1.) 9-1-2 ...
Page 24
PSR-E343/PSR-E344/YPT-340 DMLCD Circuit Board Test Method ■ The DMLCD Circuit Board is provided with test points for service check purposes. Check the test points on the DMLCD Circuit Board if the following symptoms appear. Symptoms and check items No LCD display with Power SW ON -- > Check items 1 to 7 sequentially No sound or distorted sound -- >...
Page 26
PSR-E343/PSR-E344/YPT-340 ■ TEST PROGRAM * If the test number 60 “Factory Set” is executed, the data already set will be lost. Preparations 1) Use an AC adaptor PA-3C, PA-130 or PA-130A. 2) Measuring device: Frequency counter, which can detect thousandth value or more, Level meter (with JIS-C fi lter), Oscilloscope * ...
Page 27
PSR-E343/PSR-E344/YPT-340 TEST Test descriptions, judging conditions, etc. LCD display 005: FRomChk1 Checks the FROM connected to the CPU bus (simplifi ed check). Make sure that “FRom OK” is displayed on the LCD. 009: Pit Chk Checks pitch accuracy. Connect the frequency counter to the [PHONES/OUTPUT] jack. (Either L or R) Make sure that the correct signal is output.
PSR-E343/PSR-E344/YPT-340 TEST Test descriptions, judging conditions, etc. LCD display 057: FRomChk2 Checks the FROM connected to the CPU bus. (Full address) Make sure that “FRom OK” is displayed on the LCD. It will take about 100 seconds for the check.
PSR-E343/PSR-E344/YPT-340 ■ BACKUP The following settings are always backed up, and are maintained even when the power is turned off. If you want to initialize the settings, use the Initialize operation “Initialization” as explained below. Backup parameters • User Songs •...
PARTS LIST CONTENTS(目次) OVERALL ASSEMBLY(総組立) ..........2 UPPER CASE ASSEMBLY(上ケ−ス Ass y) ......4 LOWER KEY BED ASSEMBLY(下ケース鍵盤 Ass y) ....6 KEYBOARD ASSEMBLY(16NS) ..........7 ELECTRICAL PARTS(電気部品) ..........8 Notes : DESTINATION ABBREVIATIONS Australian model Chinese model British model South-east Asia model Canadian model Taiwan model German model U.S.A.